Metal threshold



J. M. OLSON ET AL METAL THRESHOLD Aug. 23

Filed Jan, 5' 31 Jab NM 2 0 BY 00/6 15' AQ- ATT Y Patented Aug. 23, 1932 7UNIT-ED s taras' .JoHNM. onsonn'nn Louis-nivsrson, or time, nonr n nnirorn,-nssrenons- TO GHAMBERLIN METAL WEATHER srra-rr oonrnny, OF,:DETROIE-MIGHIGAN, A coa- "IPORAT'ION OF-.- MICHIGAN i seam flied Janmy 5, "19 31; wer 506,572.- g 4 This invention relates to metal thresholds, particularly such thresholds for exterior doors'of abuilding, and'the object of the inventionis to provide a metal threshold hav- 'in-ganexterior portionin: insulated relation 'with an'interior portion whereby heat or cold 'a metal threshold. 1 i 1 The preferred form of construction of a metalthreshold embodying these various features of the invention is shown in the accompanying drawing in'whi ch' V 7 Fig. 1 is a transverse sectionsho wing my improved threshold in assembled. relation witha 'dioor is shown.

and sill, a portiononly of which Fig. -2 is asectional View showing a part of the: t rior portion of the threshold in per- Spective.

Fig. Sis a similar perspective view inend section of the interior portion-of the threshold. v

Thedrawi-ng Fig.1; in so fa-r-as the threshold is concerned, is practically full size from whichit will be observed that the threshold consists of two parts or sections 1 and 2, the exterior part l'having a downwardly sloping outer portion terminating in.a down curved end 3 to contact with a sill 4.

The sill may be stone or other construction and the section 1 is secured in place by retaining screws 4 of which there may be several for which purpose the outwardly extending flange like portion is provided with a series of countersunk apertures 5 one of which is indicated in Fig. 2. The section 1 has a-horizontal part or step position 6 over which the lower end of the door 7 rides and this lower edge of the door 7 is provided with a bronze strip 8 having a downwardly inturned return-bent end 9 forming a channel to fit over tion 6 of the member 1 as the door is closed;

The door has attached thereto a spring bronze material indicated atll in the-construction shown. In this preferred form shown in Fig.

sealing strip 10; These strips 9 and form no-partofthe present invention as anytype' of sealing strip adapted for the-purpose may be used with my improved threshold and the member 1 n'iay be formed 'or constructed for co-operation therewith to prevent ingress of air through the intersticebetween the bot- 7 tom edge of the door and the threshold.

The ieatureofthe invention resides inthe "-GI'J provision of a threshold having the inner port1on thereof with-1n the interior of the buildrngm an insulated relatlon with the portion 1 extending to-the exterior o f'the building. I "Byisuch an arrangement an accumulation of irostis prevented onflthis section 2' which is the portion offlthe threshold exposed to view within the building. The purpose of my in vention is to obviate such' unsightly appearance and tendency toreadily transmit cold to the interior. I Thepreferred arrangement ofthetwo parts is shown in the drawing but various changes. 'may be'made in'the form "of the parts and the construction of, the spaced insulated edges. The feature of the'invention is involved in the use of two threshold parts connected together by inter-engaging portions spaced one from theother' byan insulating 1, the'inner edge of the part 1 has a foot portion 12 resting upon" the floor 13 and/or sill 4 which is of channel like form extending longitudinally of the/section 1. The upturned flange "14 forms a'recess to receive the insulation ll'which may be ofa'ny' approved material for thepurpose, such as'a rubberized insulating felt or othenknown commercial product or 'anymaterialithatwill serve the purpose. "It willbe noted that the inner member 2 has a downturned edge flange 15 lying in the channel formed by thefoot'portion12 and upturned edge lt thereof and that theinsulationencloses this flange 15 preventing transmission of 'heat. or cold to a material degree to the interior of the building. 1 The portion Q is Sepa'r'ateIy secured in'positionf-by the projecting edge of'this horizontal por- V tures'one .01"- which is indicated at 17 in 3.

' The threshold other respects 'isi'similar means of screws l6extending through aper 35 thereof whether utilized with door or a ,eh nged window. 1

it to known constructions in that the opposite ends thereof are usually embedded in the masonry at the opposite sides of the door opening or, in the event masonry construction is not utilized'about the door, these ends may 7 be correspondingly fitted to place with the door frame or wall defining the door opening of any of the usual constructions. The term "upper member 6 and the door simply reversed in respect to its relationship with the threshold as is herein shown. 7 r Y g It is torbe understood that the invention is equally adaptable for usewith hinged win- .dows as well as for doors in which case the two parts 1 and 2, substantially of the same vform as shown in Fig. 1,aremounted upon the sill of the window and the element 7 of Fig. lis indicative of the relationship of the swinging window or door as the case may be in either of which positions of installation the sealing strips 9and 10 may. be utilized in the same :manner as here indicated. The 7 "words metal threshold as employed in the described. 7

claims isintended to refer to the metal element having the insulation between the parts From the foregoing invention are attained by the construction What we claim and desire to secure by Letters Patent of the United Stat'esis v.

1. A metal threshold for an exterior door of a building, consisting of two sections ex tending transversely of the door opening and 7 both secured to the sill or floor portion there- 7 below, the section extending to the exterior of the door having .a longitudinal channel open at. its upper face adjacent the interior face of the doorv with the base of the channel providing the support for the inner edge of the exterior section and the other section having a depending flange lying-in the said channel, and an insulating material positioned between the said depending edge and the channel walls." 7

section having an inner edge resting upon description it is believed evident that the various objects of the ing the sill and supporting the same, the other section beingindependently secured to the floor or sill interiorly of the door and having its outer longitudinal edge engaging in the channel of the first section in insulated relation with the inner longitudinaledge' of the first member. i I t 3. .A metalthreshold for the exterior door of a'building'having a door opening and a sill, consisting of two metal sections extending transversely of the door'opening, the exterior section having a step portion and integral oppositely extending flangesthere below one of which extends to the exterior of the door in spaced relation with the step portion and the other of which extends to a position slightly inwardly .ofthe inner i facerof the door terminatingiwith an open vchannelilikev portion at its inner edge resting upon the sill, and a secondand separate inner the floor and extending upwardlytherefrom in curvedform practically in alignment with the upper surface of the inwardly extending flange of the first section and having a downturned. edge engaging in the open channel, and insulating material'in the channel separating" the said inner and outer sections.- .1

4. A metal threshold foranexterior. door of a building having a door opening/and a sill, comprising two metal sections extending transversely of the door open l g,the.ex-

. terior section having a step gportion provided with a flangeextending to theexterior of the opening and a flange extending'andfloo terminating approximately in the plane occupied by the inner face of the .door when closed, said vflanges providingan interior .and exterior support for the step portion, a

second section interengaging withithe first section and extending inwardly from the interior flange of the first section, and 'in sulating material between the said sections.

In testimony whereof wesign this specification. T I

' JOHN MJOLSON. LOUIS, E, NELSON;

' 2. Ametal threshold for the exterior door v I "of a building, consisting of two sections extending transversely of the door opening, one

- section having a portion thereof extending exteriorly of the "door terminating in an upturned edge providing an open channel supported by the sill and further having a footl ke P i n t ard, h p i e e nse I 

